Not every celeron cpu is good for multi gpu mining. I remember from eth mining days when I bought wrong celeron for my 19xpcie motherboard. Celeron G3900 works with multiple (8+) gpus at x1 pcie.
Do not use first pcie slot, IMPORTANT it is x16 and it uses up most pcie lanes.
TLDR: DO NOT PUT GPU IN FIRST SLOT, LEAVE EMPTY
This makes sense, though using a Celeron for a large (> $5k) GPU rig is too minimalist IMO. Spend an extra $100 for a i3 or i5.
In this case there is still the issue of it being Tesla GPUs. They have much more VRAM to support and may have minimum lane requirements.
I'm not speaking from actual experience. I expect a motherboard designed for mining would work out of the box in most cases. The unknown
variable seems to be using Tesla GPUs in a large rig.